Imam Ali (AS) said, I have never slept with a promise I made to someone that had remained unfulfilled, thereby causing him to toss and turn restlessly in his bed so that he could successfully get what he needs [from me in the morning] but that my restlessness on my bed was much greater as a result of my desperation to meet him and fulfil the debt of his promise and out of fear of a hindrance that could cause its reneging, for indeed reneging on a promise is not from the characteristics of the honourable.